Mr. Thompson worked with Forter co-founders Michael Reitblat and Liron Damri when a company where they previously worked, Fraud Sciences, was acquired by PayPal in 2008 for about $169 million.

At the time, Mr. Thompson was the president of PayPal. He is regarded by Forter’s co-founders as a mentor, Mr. Reitblat said.

Mr. Thompson went on in 2012 to briefly become CEO of Yahoo Inc., a post he resigned after being accused of falsifying the credentials on his resume by saying he had a computer science degree when he did not, The Wall Street Journal reported.

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